<template>
  <!--  v-model="props.value" -->
  <el-autocomplete
    v-model="state"
    :fetch-suggestions="querySearch"
    popper-class="my-autocomplete"
    placeholder="Please input"
    @select="handleSelect"
  >
    <template #suffix>
      <el-icon class="el-input__icon" @click="handleIconClick">
        <edit />
      </el-icon>
    </template>
    <template #default="{ item }">
      <div class="value">{{ item.value }}</div>
      <span class="link">{{ item.link }}</span>
    </template>
  </el-autocomplete>
</template>

<script setup>
import { onMounted, ref, watch } from 'vue'
import { Edit } from '@element-plus/icons-vue'

const state = ref('')

// 组件中对外公开的属性是只读的
const props = defineProps({
  value: {
    // 是否必须属性
    require: true,
    // 属性类型
    type: String,
    // 默认值
    default: ''
  }
})
/**
 * 被监听的属性
 */
watch(
  () => props.value,
  (newVlaue, oldValue) => {
    console.log('watch  value---------------------')
    console.log(newVlaue)
    state.value = newVlaue
    console.log(oldValue)
  },
  { immediate: true, deep: true }
)

const emits = defineEmits(['selectChanged'])

const links = ref([])

const querySearch = (queryString, cb) => {
  const results = queryString ? links.value.filter(createFilter(queryString)) : links.value
  // call callback function to return suggestion objects
  cb(results)
}
const createFilter = (queryString) => {
  return (restaurant) => {
    return restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
  }
}
const loadAll = () => {
  return [
    { value: 'vue', link: 'https://github.com/vuejs/vue' },
    { value: 'element', link: 'https://github.com/ElemeFE/element' },
    { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
    { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
    { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
    { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
    { value: 'babel', link: 'https://github.com/babel/babel' }
  ]
}
const handleSelect = (item) => {
  emits('selectChanged', item)
}

const handleIconClick = (ev) => {
  console.log(ev)
}

onMounted(() => {
  links.value = loadAll()
})
</script>

<style>
.my-autocomplete li {
  line-height: normal;
  padding: 7px;
}
.my-autocomplete li .name {
  text-overflow: ellipsis;
  overflow: hidden;
}
.my-autocomplete li .addr {
  font-size: 12px;
  color: #b4b4b4;
}
.my-autocomplete li .highlighted .addr {
  color: #ddd;
}
</style>
